Section 3 – Safety Functions
3 Safety functions
3.1 Function for safe use with open flue fuel burning devices.
Only to be used if permitted by relevant regulations in your country of use.
(Prevents open flue gases being drawn back into the room.)
The ventilation unit has an integrated function for safe use with open flue devices. With this function enabled
(indicted by an “F” in the standard display), the air pressure outside and inside is kept in balance which
ensures that the unit can be used safely with the open flue device.
3.2 Frost protection of MVHR unit (Display shows “Cool Down Protection”)
(Protects unit from frost damage)
If the property is not heated in low outdoor temperatures (e.g. when the heating has been switched off or it
has broken down), the unit cannot recover any heat from the extracted air. In order to prevent the inside of
the unit from freezing, the unit is switched off automatically when the extracted-air is less than +3°C.
The display reads “
Cool Down Protection
”.
Pressing
OK
will show “
Switch Room Heating On
”.
The ventilation unit will switch back on again after 15 or 30 minutes, depending on the room temperature.
It will remain Off if the extracted air is still less than 3°C.
3.3 Frost protection of property (Display shows “Frost Protection, UNIT OFF”)
(Protects property from frost damage)
If the Supply air temperature drops below 8°C the whole unit will automatically switch off, in order to protect
the property from frost damage. The unit will remain off for 60 mins so that room temperatures can recover.
The unit will automatically switch on again when the Supply air temp. is above 9°C.
The display reads
“Frost Protection UNIT OFF”
.
Pressing
OK
will show “
Check Unit Operation
”. (Ensure Summer bypass “B”is Off. Check Extract fan is OK)
The unit will switch back on again after 60 minutes if the Supply air temperature is greater than 9°C.
3.4 Smoke detector (Safety cut-out)
The ventilation unit can be switched off immediately by an external smoke detector (emergency stop
function).
When the smoke alarm is activated, the unit cannot be switched on.
•
The display reads “
SMOKE ALARM, UNIT IS OFF
”.
When the smoke alarm is over :
•
The display reads “
SMOKE ALARM OVER, Press OK
”.
Press the
OK
button to return the unit to Normal operation in the “Off” state.
•
Select “Automatic” to re-start the unit.
12
